From 53b1c87862eaada688f8f74b74ff8755d900538b Mon Sep 17 00:00:00 2001
From: Markus Frank <Markus.Frank@cern.ch>
Date: Fri, 9 Aug 2019 17:21:17 +0200
Subject: [PATCH] Fix plugin service linkage for MAC

---
 cmake/DD4hepBuild.cmake | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cmake/DD4hepBuild.cmake b/cmake/DD4hepBuild.cmake
index 39350e7f0..4383f00be 100644
--- a/cmake/DD4hepBuild.cmake
+++ b/cmake/DD4hepBuild.cmake
@@ -1464,8 +1464,8 @@ function ( fill_dd4hep_library_path )
 
   string(REGEX REPLACE "/lib/libCore.*" "" ROOT_ROOT ${ROOT_Core_LIBRARY})
   SET( ENV{DD4HEP_LIBRARY_PATH} ${ROOT_ROOT}/lib )
-  if ( ${} )
-    SET( ENV{DD4HEP_LIBRARY_PATH} ${BOOST_LIBRARYDIR}:$ENV{DD4HEP_LIBRARY_PATH} )
+  if ( ${Boost_LIBRARY_DIR} )
+    SET( ENV{DD4HEP_LIBRARY_PATH} ${Boost_LIBRARY_DIR}:$ENV{DD4HEP_LIBRARY_PATH} )
   endif()
   if ( ${DD4HEP_USE_GEANT4} )
     string(REGEX REPLACE "/lib/Geant4.*" "" Geant4_ROOT ${Geant4_DIR})
-- 
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